1) Freeze the gum. I put my clothes in the freezer but you can use ice cubes too, the point is to get it COLD.
2) Once frozen, get a butter knife or some sort of scraping utensil and scrape away all the pieces. Be gentle and careful on more delicate fabrics.
3) Get a bucket or use a sink or something and fill it with white distilled vinegar, let your clothes soak for 30 minutes to an hour (depending on severity) or however long it takes for you to see the stain disappear.
4) Rinse in cold water and then wash normally so the vinegar smell is removed.
And that’s how you do it. The vinegar works wonders on stains. It’s a bunch of work but it’s worth it.